1. Institute of Biochemistry, Biocenter, Center for Membrane Proteomics (CMP), and Cluster of Excellence Frankfurt (CEF)—Macromolecular Complexes, Goethe-University Frankfurt, Max-von-Laue-Strasse 9, D-60438 Frankfurt/M., Germany
2. Walter Schottky Institute, Technical University Munich, Am Coulombwall 3, 85748 Garching, Germany